<html>
<head>
<title>Sample App</title>
<style>
body {
font-family: SF UI Text, Roboto, Helvetica Neue, Helvetica, sans-serif;
font-size: 18px;
line-height: 1.5;
}
</style>
</head>
<body>
<div id="root"></div>
</body>
</html>